Lee Kwang-Ming, Chang Chung-Cheng, Wang Jia-Ming, Chang Chia-Yu, Huang Chia-Hong
Department of Chemistry, National Kaohsiung Normal University, Kaohsiung 824004, Taiwan.
Department of Electrical Engineering, National Taiwan Ocean University, Keelung 202301, Taiwan.
Nanomaterials (Basel). 2023 Feb 2;13(3):596. doi: 10.3390/nano13030596.
It is shown in this paper that a polymer, MA-PEG 1000-DGEBA (MP1D), exhibits antireflection, substrate-dependent photoluminescence (SDP), wide band-gap, and photoconduction characterization. MP1D was synthesized from maleic anhydride, polyethylene glycol 1000, and bisphenol-A diglycidyl ether. Self-assembled nanoparticles embedded in MP1D film and ranging from 2.5 to 31.6 nm are observed, which could be expected as scatterers to enhance light trapping and extraction. The size of the nanoparticle increases with the concentration of the MP1D solution. Besides solution concentration, the nanoparticle dimension could be modified by the chain length of polyethylene glycol in the polymer synthesis. The effects of solution concentration, annealing temperature, annealing period, and substrate on the photoluminescence (PL) of MP1D films are examined. Increasing solution concentration increases PL intensity. However, aggregation-caused quenching is explicit as the solution concentration exceeds 100 mM. PL intensity increases with annealing temperature, which could be attributed to crystallinity improvement. PL intensity increases with increasing the annealing period from 0.5 to 2 h. Nonetheless, as the annealing period exceeds 2 h, PL quenching is emerging, which could be due to aggregation. It is expected that MP1D could be a promising candidate for host materials and MP1D film could play a multifunctional role (antireflective and light-trapping functions) in optoelectronics.
本文表明，一种聚合物MA-PEG 1000-DGEBA（MP1D）具有抗反射、衬底依赖性光致发光（SDP）、宽带隙和光电导特性。MP1D由马来酸酐、聚乙二醇1000和双酚A二缩水甘油醚合成。观察到嵌入MP1D薄膜中的自组装纳米颗粒，其尺寸范围为2.5至31.6nm，这些纳米颗粒有望作为散射体增强光捕获和提取。纳米颗粒的尺寸随MP1D溶液浓度的增加而增大。除溶液浓度外，纳米颗粒尺寸可在聚合物合成中通过聚乙二醇的链长进行调节。研究了溶液浓度、退火温度、退火时间和衬底对MP1D薄膜光致发光（PL）的影响。溶液浓度增加会提高PL强度。然而，当溶液浓度超过100 mM时，聚集导致的猝灭现象明显。PL强度随退火温度升高而增加，这可归因于结晶度的提高。PL强度随着退火时间从0.5小时增加到2小时而增加。然而，当退火时间超过2小时时，PL猝灭出现，这可能是由于聚集所致。预计MP1D可能是一种有前途的主体材料候选物，并且MP1D薄膜在光电子学中可发挥多功能作用（抗反射和光捕获功能）。
